// Copyright 2025 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Flags: --allow-natives-syntax --turbofan

var stringConstant = 'a long enough string constant';
function foo(s) {
  return stringConstant + s;
}
%PrepareFunctionForOptimization(foo);

foo(new String(' and more stuff'));

%OptimizeFunctionOnNextCall(foo);

let result = foo(new String(' and more'));
assertFalse(%StringIsFlat(result));
assertOptimized(foo);
